From patchwork Thu Dec 3 20:46:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 337521 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6BD58C4361A for ; Thu, 3 Dec 2020 20:50:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 08871221EC for ; Thu, 3 Dec 2020 20:50:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731548AbgLCUuM convert rfc822-to-8bit (ORCPT ); Thu, 3 Dec 2020 15:50:12 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:62382 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727406AbgLCUuM (ORCPT ); Thu, 3 Dec 2020 15:50:12 -0500 Received: from pps.filterd (m0044012.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0B3Kf1YM027602 for ; Thu, 3 Dec 2020 12:49:31 -0800 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com with ESMTP id 356xfqv240-5 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 03 Dec 2020 12:49:31 -0800 Received: from intmgw004.03.ash8.facebook.com (2620:10d:c085:108::8) by mail.thefacebook.com (2620:10d:c085:11d::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Thu, 3 Dec 2020 12:48:26 -0800 Received: by devbig012.ftw2.facebook.com (Postfix, from userid 137359) id B8E282ECA8BF; Thu, 3 Dec 2020 12:48:23 -0800 (PST) From: Andrii Nakryiko To: , , , CC: , Subject: [PATCH v6 bpf-next 13/14] selftests/bpf: add tp_btf CO-RE reloc test for modules Date: Thu, 3 Dec 2020 12:46:33 -0800 Message-ID: <20201203204634.1325171-14-andrii@kernel.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20201203204634.1325171-1-andrii@kernel.org> References: <20201203204634.1325171-1-andrii@kernel.org> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312, 18.0.737 definitions=2020-12-03_12:2020-12-03,2020-12-03 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 bulkscore=0 adultscore=0 priorityscore=1501 spamscore=0 mlxlogscore=940 mlxscore=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 suspectscore=8 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012030121 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add another CO-RE relocation test for kernel module relocations. This time for tp_btf with direct memory reads. Signed-off-by: Andrii Nakryiko --- .../selftests/bpf/prog_tests/core_reloc.c | 3 +- .../bpf/progs/test_core_reloc_module.c | 32 ++++++++++++++++++- 2 files changed, 33 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc.c b/tools/testing/selftests/bpf/prog_tests/core_reloc.c index bb980848cd77..06eb956ff7bb 100644 --- a/tools/testing/selftests/bpf/prog_tests/core_reloc.c +++ b/tools/testing/selftests/bpf/prog_tests/core_reloc.c @@ -514,7 +514,8 @@ static struct core_reloc_test_case test_cases[] = { }, /* validate we can find kernel module BTF types for relocs/attach */ - MODULES_CASE("module", "raw_tp/bpf_testmod_test_read", "bpf_testmod_test_read"), + MODULES_CASE("module_probed", "raw_tp/bpf_testmod_test_read", "bpf_testmod_test_read"), + MODULES_CASE("module_direct", "tp_btf/bpf_testmod_test_read", NULL), /* validate BPF program can use multiple flavors to match against * single target BTF type diff --git a/tools/testing/selftests/bpf/progs/test_core_reloc_module.c b/tools/testing/selftests/bpf/progs/test_core_reloc_module.c index d1840c1a9d36..56363959f7b0 100644 --- a/tools/testing/selftests/bpf/progs/test_core_reloc_module.c +++ b/tools/testing/selftests/bpf/progs/test_core_reloc_module.c @@ -36,7 +36,7 @@ struct core_reloc_module_output { }; SEC("raw_tp/bpf_testmod_test_read") -int BPF_PROG(test_core_module, +int BPF_PROG(test_core_module_probed, struct task_struct *task, struct bpf_testmod_test_read_ctx *read_ctx) { @@ -64,3 +64,33 @@ int BPF_PROG(test_core_module, return 0; } + +SEC("tp_btf/bpf_testmod_test_read") +int BPF_PROG(test_core_module_direct, + struct task_struct *task, + struct bpf_testmod_test_read_ctx *read_ctx) +{ + struct core_reloc_module_output *out = (void *)&data.out; + __u64 pid_tgid = bpf_get_current_pid_tgid(); + __u32 real_tgid = (__u32)(pid_tgid >> 32); + __u32 real_pid = (__u32)pid_tgid; + + if (data.my_pid_tgid != pid_tgid) + return 0; + + if (task->pid != real_pid || task->tgid != real_tgid) + return 0; + + out->len = read_ctx->len; + out->off = read_ctx->off; + + out->read_ctx_sz = bpf_core_type_size(struct bpf_testmod_test_read_ctx); + out->read_ctx_exists = bpf_core_type_exists(struct bpf_testmod_test_read_ctx); + out->buf_exists = bpf_core_field_exists(read_ctx->buf); + out->off_exists = bpf_core_field_exists(read_ctx->off); + out->len_exists = bpf_core_field_exists(read_ctx->len); + + out->comm_len = BPF_CORE_READ_STR_INTO(&out->comm, task, comm); + + return 0; +}